import { getAlbyService } from './alby'
import type { AlbyInvoice } from '@/types/alby'
import type { ArticleDraft } from './articlePublisher'

/**
 * Create Lightning invoice for article
 * Requires Alby/WebLN to be available and enabled
 */
export async function createArticleInvoice(draft: ArticleDraft): Promise<AlbyInvoice> {
  const alby = getAlbyService()
  await alby.enable() // Request permission

  const invoice = await alby.createInvoice({
    amount: draft.zapAmount,
    description: `Payment for article: ${draft.title}`,
    expiry: 86400, // 24 hours
  })

  return invoice
}

/**
 * Create preview event with invoice tags
 */
export function createPreviewEvent(
  draft: ArticleDraft,
  invoice: AlbyInvoice,
  authorPresentationId?: string,
  extraTags: string[][] = []
): {
  kind: 1
  created_at: number
  tags: string[][]
  content: string
} {
  const tags = buildPreviewTags(draft, invoice, authorPresentationId, extraTags)

  return {
    kind: 1 as const,
    created_at: Math.floor(Date.now() / 1000),
    tags,
    content: draft.preview,
  }
}

function buildPreviewTags(
  draft: ArticleDraft,
  invoice: AlbyInvoice,
  authorPresentationId?: string,
  extraTags: string[][] = []
): string[][] {
  const base: string[][] = [
    ['title', draft.title],
    ['preview', draft.preview],
    ['zap', draft.zapAmount.toString()],
    ['content-type', 'article'],
    ['invoice', invoice.invoice],
    ['payment_hash', invoice.paymentHash],
  ]
  if (draft.category) {
    base.push(['category', draft.category])
  }
  if (authorPresentationId) {
    base.push(['author_presentation_id', authorPresentationId])
  }
  // Preserve any kind_type tags in extraTags if provided by caller
  if (extraTags.length > 0) {
    base.push(...extraTags)
  }
  return base
}